|
Post by coldspaces on May 18, 2015 23:06:31 GMT
The winding data is in the Servicing Hermetic Unit copies you have. It is but didn't match what I removed from the run windings. They list an early and late DR2 and neither matched on the run winding. Middle part of the run winding had more loops than the book shows. The windings did still have a bit of a so2 smell but not too bad since it was sitting for months with just dry nitrogen in it.
|
|
|
Post by 2030vision on May 18, 2015 23:14:23 GMT
If I ever needed surgery and coldspaces was a doctor, I would insist on being his patient.
SIR DO YOU EVER SLEEP?
|
|
|
Post by coldspaces on May 18, 2015 23:20:27 GMT
If I ever needed surgery and coldspaces was a doctor, I would insist on being his patient. SIR DO YOU EVER SLEEP? Yes 6-7 hours every night.
|
|
|
Post by 2030vision on May 18, 2015 23:25:46 GMT
Amazing work !
|
|
|
Post by coldspaces on May 19, 2015 0:05:34 GMT
Will be if i get it done and it works.
|
|
|
Post by coldspaces on May 25, 2015 4:06:20 GMT
Well I have been on a crash course for motor rewinding via the internet, sure don't know how I would do it without Google. So far I have some hermetic grade insulating paper (Nomex 410)on the way to insulate the slots the windings go in and between the windings. Hermetic grade wire is easy to find but still needs to be ordered. The tie cord for holding the windings in place is another story. Looks like I may have to buy way more than I need to get a little. Was thinking of using used cord till I read it is made to shrink about 10% when heated to 350F to hold the windings tight.
|
|
|
Post by 2030vision on May 25, 2015 11:59:42 GMT
Gil, If you ever even remotely are thinking of using SO2 in that someday I would go for teflon (class H) and dont use baking varnish. You lock yourself in if you use contemporary materials..what I'm saying is you can never go back if you feel you want to experiment.
John investigated compatibility issues extensively before rewinding mine. Given your extreme level of thoroughness in these things you probably have done this. You know I have to feel important by adding my two cents!!!
|
|
|
Post by coldspaces on May 25, 2015 14:00:40 GMT
Gil, If you ever even remotely are thinking of using SO2 in that someday I would go for teflon (class H) and dont use baking varnish. You lock yourself in if you use contemporary materials..what I'm saying is you can never go back if you feel you want to experiment. John investigated compatibility issues extensively before rewinding mine. Given your extreme level of thoroughness in these things you probably have done this. You know I have to feel important by adding my two cents!!! Glad you did. I must admit I started this project "winging" it as I have never rewound a motor in my life. So no baking varnish at all? The teflon coated wire will last even if it's not locked in place by varnish? Sounds like it would be worth it if I can skip the varnishing step even if not going back to so2 . Thanks for the input.
|
|
|
Post by 2030vision on May 25, 2015 14:17:43 GMT
Gil, The reason I caution against baking varnish is because the contemporary baking varnishes are attacked by SO2, that is why they were tied. You have to use all natural materials if you ever want to go back to SO2 . I suggest class H (teflon) because it has the highest temperature rating and is compatible with SO2. I mention these things because I know you will just have play with SO2someday...it's your nature!!!!
|
|
|
Post by coldspaces on May 26, 2015 0:41:56 GMT
Looks like the PTFE (Teflon) wire is gonna cost way too much so far. I am not sure it's worth putting back to so2.Sent some emails to 3 co.so far. Will see what kinda prices they quote if any. Also I might know someone who could try a 134a conversion.
|
|
|
Post by 2030vision on May 26, 2015 0:50:08 GMT
Yes,teflon is pricey. John had palo alto electric in California rewind mine with the teflon because he has staying with so2 and he was concerned about the notorious problems DRs have with heat. A 134a conversion..who might that be!?
|
|
|
Post by coldspaces on Feb 24, 2020 3:50:14 GMT
After a few weeks of being too busy at work and playing with building electromagnets I decided it was time to get another rewind under my belt. This DR-2 winding has passed the aluminum can test. Time to get some epoxy ordered and replace the leads on Travis's stator. Looks like this so called seized DR may live again if things are still good under the dome. Still need to lift a dome and see if things stayed loose and mostly rust free.
|
|
|
Post by turbokinetic on Feb 24, 2020 14:25:46 GMT
After a few weeks of being too busy at work and playing with building electromagnets I decided it was time to get another rewind under my belt. This DR-2 winding has passed the aluminum can test. Time to get some epoxy ordered and replace the leads on Travis's stator. Looks like this so called seized DR may live again if things are still good under the dome. Still need to lift a dome and see if things stayed loose and mostly rust free. That looks good, as usual! I bet that if you covered it up and left some N2 in the dome it will still look like it did when closed up.
|
|
|
Post by coldspaces on Feb 24, 2020 22:21:57 GMT
After a few weeks of being too busy at work and playing with building electromagnets I decided it was time to get another rewind under my belt. This DR-2 winding has passed the aluminum can test. Time to get some epoxy ordered and replace the leads on Travis's stator. Looks like this so called seized DR may live again if things are still good under the dome. Still need to lift a dome and see if things stayed loose and mostly rust free. That looks good, as usual! I bet that if you covered it up and left some N2 in the dome it will still look like it did when closed up. No this one is not sealed up. Dome is setting in grove is all. Lines are sealed with rubber caps.
|
|
|
Post by turbokinetic on Feb 25, 2020 1:29:55 GMT
That looks good, as usual! I bet that if you covered it up and left some N2 in the dome it will still look like it did when closed up. No this one is not sealed up. Dome is setting in grove is all. Lines are sealed with rubber caps. Well...... even in spite of that I shall remain very hopeful.
|
|